sfc: Run event/IRQ self-test asynchronously when interface is brought up

Generate a test event on each event queue whenever the interface is
brought up, then after 1 second check that we have either handled a
test event or handled another IRQ for each event queue.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/selftest.c b/drivers/net/ethernet/sfc/selftest.c
index aa4ab53cac57..de4c0069f5b2 100644
--- a/drivers/net/ethernet/sfc/selftest.c
+++ b/drivers/net/ethernet/sfc/selftest.c
@@ -702,6 +702,8 @@ int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests,
         enum reset_type reset_method = RESET_TYPE_INVISIBLE;
         int rc_test = 0, rc_reset = 0, rc;
 
+        efx_selftest_async_cancel(efx);
+
         /* Online (i.e. non-disruptive) testing
          * This checks interrupt generation, event delivery and PHY presence. */
 
@@ -794,3 +796,36 @@ int efx_selftest(struct efx_nic *efx, struct efx_self_tests *tests,
         return rc_test;
 }
 
+void efx_selftest_async_start(struct efx_nic *efx)
+{
+        struct efx_channel *channel;
+
+        efx_for_each_channel(channel, efx)
+                efx_nic_event_test_start(channel);
+        schedule_delayed_work(&efx->selftest_work, IRQ_TIMEOUT);
+}
+
+void efx_selftest_async_cancel(struct efx_nic *efx)
+{
+        cancel_delayed_work_sync(&efx->selftest_work);
+}
+
+void efx_selftest_async_work(struct work_struct *data)
+{
+        struct efx_nic *efx = container_of(data, struct efx_nic,
+                                           selftest_work.work);
+        struct efx_channel *channel;
+        int cpu;
+
+        efx_for_each_channel(channel, efx) {
+                cpu = efx_nic_event_test_irq_cpu(channel);
+                if (cpu < 0)
+                        netif_err(efx, ifup, efx->net_dev,
+                                  "channel %d failed to trigger an interrupt\n",
+                                  channel->channel);
+                else
+                        netif_dbg(efx, ifup, efx->net_dev,
+                                  "channel %d triggered interrupt on CPU %d\n",
+                                  channel->channel, cpu);
+        }
+}